The Supernova At The End of Time
Summary
This episode explores a new theory by astrophysicist Matt Kaplan suggesting that the universe will end with "black dwarf supernovae" rather than just black hole evaporation. The host explains how Chandrasekhar’s limit and pycnonuclear fusion lead to iron stars that eventually collapse due to electron depletion. The segment also reviews audience questions regarding the arrow of time, memory, and the double-slit experiment.
Topics discussed
Introduction: The universe ends in black dwarf supernovae
The fate of the last iron star and Matt Kaplan's update
Historical context: Chandrasekhar on the SS Pilsner
Quantum mechanics, degenerate matter, and white dwarfs
The Chandrasekhar limit and relativistic effects
Cooling white dwarfs into crystalline black dwarfs
Pycnonuclear fusion and the formation of iron stars
Proton stability and the eventual black hole phase
Kaplan's finding: Electron depletion and instability
Timeline of black dwarf supernovae and solar system fate
Patreon shoutout to Sean Maddox
Viewer comments: The arrow of time and memory
Reversing time: Observers and the block universe
Double slit experiment and many-worlds interpretation
Sponsor: Edward Jones
Sponsor: USAA Auto Insurance
Listen ad-free on Castria